Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Publish singlevm scenarios

    They ease creating all ressources to execute command in a new VM
    reachable via ssh. This scenarios should be reused by other
    more advanced ones (shaker, vping, cinder, etc.).

    Change-Id: If23866827c64a7afbdd8ff596dbc33710ee4ee20
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9791618..0f6c31a 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 979161874ba837f55a53aba391966c52433123e6
+Subproject commit 0f6c31a434873068e6c3bfecf31930536bf59d2f